Showing posts with label education. Show all posts
Showing posts with label education. Show all posts

Monday, July 10, 2017

Why They Fight Russia in the Air, But Not at Sea

Open Ocean Combat

We have been observing rising violence on the land, sea as well as in the air, after a break of some years, from some familiar sources. As in the past few months there have been recurrent conflicts on the sea, particularly from the Chinese as well as the Iranians.

But in the case of the Russians we only seem to knock up against their elements in the sky which is due to two core elements namely geography and terror. Though several may not be aware of it, it was not till recently that such things like an `open ocean’ combat had taken place in military history. Navies had for most of the time, found themselves restrained either by depth, winds or currents to certain routes.

Besides that there had been the tussle to essentially discover their opponent out on the open ocean and for this purpose, certain chokepoints have envisaged various naval clashes. Credits of our own independence is due to one such fight between a French battle fleet and the British Royal Navy which had stopped the British from being capable of evacuating Lord Cornwallis at Yorktown in 1781 and eventually had terminated the war.

Chokepoints – Straits Leading to Ocean

The fight had begun right at the mouth of the Chesapeake Bay where the French had been waiting for the Brits and hence it had been that these chokepoints like straits leading to the ocean had turned out to be blockages for those following them also.

 It was this that had been driving the Russian crazy for at least four centuries. The Russia Empire since the time of Tsar Peter the Great had pursued expansion to increase not only their wealth but regularly endless search in obtaining unfettered access to the sea. Fettered termed has been utilised since the Russia had actually been restrained with regards to their access to the open oceans.

Their port towards the top of the Baltic Sea in the Gulf of Finland had been initiated by the same Tsar Peter and had been humbly named after him. St Petersburg has long given the Russians the facility to move in the adjoining bodies of water though a bit more.

Getting to the actual blue water and the whole of the globe would mean getting beyond the Danes as well as the Norwegians or even both and that alone was not a convincing proposal even before NATO.

Deep Water Sheltered Port – Access Black Sea

Destined towards the north by geography at the entrance of the Baltic and with ice above the Arctic Circle, the Russians moved south and ran into the same kind of situation as they stretched. Tsarina Catherine the Great had pressed downward and had incorporated the Ukraine together with it the Crimean peninsula into greater Russia.

 The Russian naval base of Sebastopol with her founding had a deep water sheltered port which enabled them to access the Black Sea. However they still has been hemmed in now for a number of centuries by the ironclad lock of the Bosporus more recently at least nominally by the Treaty of Montreaux.

Even if they managed to get out, they would still only have access to the Mediterranean and not the actual open ocean. They tend to have access to the Pacific though it is quite far away from their epicentre and there their operationary to be mostly expeditionary just on leaving the base.

Rodina – Motherland – Land Issue

All this goes a long way in comprehending half of the reasons why the Russians are seen nudging up against us from the sky. To comprehend the remaining half, one could recall that the Russians tend to be really, extremely, fearful. It seems to be all about defense of the Rodina, the `Motherland’ for them and that seems to be a land issue.

 All that they do and design is said to be directed upon that individual prevailing passion. For this purpose, the Russian and before that the Soviet, Navy was and is, designed with power projection in mind as well as with disruption of anyone who tends to influence events on land and hence would be a land threat to them.

It is for this reason that they tend to have an extensive, and to some extent technologically striking, track record in submarines building though not aircraft carriers. This is also the reason why they seem to make long-range anti-ship missiles though are not progressing anything even distantly impending an oceanic system of at-sea replacement or restoration.

A century ago, they had given up on true battleships and knew that they could never combat their way out from their two significant naval bases on the surface and stopped attempting. On the contrary they aimed on developing the weapons which could stop America as well as the other NATO and world allied from getting to Europe and through it, on land, to the Motherland.

Tuesday, July 4, 2017

Your Guide to Solving the Next Online Viral Maths Problem

Precise Means of Online Equations - Explained

Several times we may have come across an online post or a fragment of a social media feed stating something such as `This math Problem is Stumping the whole Internet & Can You Solve It? Or Apparently 9 out of 10 people get this wrong. Do you know the answer?

‘At the core of the post there tends to lie numbers and symbols. Irrespective of how hard you may tend to try, it may seem impossible to accept the challenges. One may attempt to do so and on checking on the comment sector you are likely to get to know that some have agreed with your answers while the others tend to have a different point of view. The precise means of approaching these online equations with the least of hassle is explained below:

Language of Mathematics


We tend to read from left to right in the English language and hence it seems natural to view mathematical equations in the same manner. However one would not try to read Arabic or Mandarin in the same way nor would they try to do so with the discrete language of mathematics. In order to be maths-literate, it is essential to comprehend some of the applicable rules regarding spelling and grammar in mathematics.

 A set of firm rules called the order of operations tends to express the precise arithmetical grammar wherein it conveys to us the system in which the mathematical operations need to be performed such as addition and multiplication when they both appear in an equation. The mnemonic BODMAS – Brackets, Order, Division, Multiplication, Addition, and Subtraction, in Australia tends to teach students in assisting them to recall the correct order.

In BODMAS, the order tends to refer to mathematical powers like squared, cube or square root. This could be taught in other countries as PEMDAS, BEDMAS or BIDMAS though all these may come down to precisely the same thing. For instance, it would mean that if we have an equation containing addition as well as multiplication we tend to carry out multiplication first irrespective of the order where they are written.
While considering the equations:
  • (a) 3 x 4 + 2 
  • (b) 2 + 3 x 4
When BODMAS is applied we see that these equations are precisely the same or equivalent and in both the cases we tend to calculate 3x4=12 and then calculate 12+2=14. However some may tend to get an incorrect answer for the second equation since they would have tried solving it from left to right. They may do the addition first (2+3=5) and thereafter multiplication of (5x4) in order to get a wrong answer of 20.

Brackets tend to make a difference


It is here where the brackets tend to be beneficial segment of arithmetical punctuation. A well placed bracket in maths could change the calculation completely. They are utilised in providing a specific part of an equation and we always carry out the calculation within the bracket before dealing with what is outside the bracket. If brackets are introduced around the addition in equation in the above equations we then tend to have two new equations namely
  • (c) 3x(4+2) 
  • (d) (2+3)x4

Correct Understanding of Operation


These equations are not equivalent to each other and in both the cases, the bracket conveys to us to carry out the addition before doing the multiplication. This would mean that we have to compute 3x6 for (c) and for (d) 5x4. We now arrive at different answers wherein the answer for (c) is 18 and (d) is 20. In the case of (a) and (b) equations brackets were not essential since BODMAS conveys to us to do the multiplication before addition.

But with the addition of brackets which reinforces the BODMAS rules could be helpful in evading confusion. Comprehending BODMAS is likely to get us most of the way with regards in resolving the problem though it also assists in being aware of the commutative as well as the associative properties of mathematics. Calculated process is said to be commutative if it is not considered in which order the numbers are said to be written in and addition is commutative since a+b=b+a. However subtraction is not a commutative since a-b is not the same as b-a.

 Moreover it is also direct to display that multiplication is commutative while division is not. An operation is said to be associative when we have numerous successive incidences of this type of operation and it does not matter to which order we carry them out.

Moreover addition as well as multiplication seems to have this property and though subtraction together with division does not have the same. Once the understanding of the correct order of operation together with the associative as well as commutative properties has been arrived we tend to have the tool-box in solving any well-defined arithmetical equation.

Tuesday, December 17, 2013

Brazing Copper: A Comprehensive Guide and Overview

Brazing copper is a process where metal is joined by a filler metal. It is heated above a melting point and distributed between two or more parts. The filler metal is generally slightly above its melting temperature and is protected by a suitable atmosphere. It flows over the base metal—also known as a wetting—and is cooled in order to keep the pieces working together.

Brazing is very similar to soldering. Soldering is a process where two or more metal items are joined together by melting and flowing a filler metal—known as a solder—into the joint, with the filler metal having a lower melting point than the contiguous metal.

The one main difference between brazing copper and soldering is its temperature. When it comes to brazing, the filler metal temperature is higher.

What is important to know about brazing? 

Well, for one thing, obtaining high-quality brazed joints requires parts to be closely fitted. The base metals must be clean and oxide-free. One of the most important parts of brazing is the joint clearance.
What are the recommended joint clearances for brazing?

For brazing, the recommended joint clearances are 0.03 to 0.08 mm, or 0.0012 to 0.0031 in. This is for the best capillary action and joint strength.

What is capillary action?

Capillary action is the ability of a liquid to flow in narrow spaces, without the assistance or opposition of gravity.

What can cause faulty joints?

Faulty joints can be caused by a myriad of various reasons, including improper joint preparation prior to brazing, lack of proper support, improper heat control and distribution, inadequate amount of filler metal applied, and sudden shock cooling.

What are some common types of brazing?

When it comes to brazing copper, some companies specialize in furnace type and some by using the resistance method.  When brazing copper or any precious metals, the brazing of the copper or other metal to each other can be tricky and is a critical part of the process.  Depending on the method of brazing the copper, this will determine whether the copper and other metal are held in place by jigs or by pressure, at least until the brazing is complete. This is common for use when brazing copper to a more expensive metal such as silver alloy for use in making electrical contacts. This allows for electrical contacts to meet the important precious metal content requirement while brazing the copper to the contact material allows for the remaining part of the contact’s design to be formed as needed
.
Which industries typically implement the use of copper brazing? 

Quite a few, but some of the most common include the plumbing industry, automotive industry, and the HVAC (heating ventilation and air conditioning) industry.

Brazing copper is one of the most common methods of joining copper tubes and fittings. When brazing copper, it is important to braze the assembly to at least 800° F. However, it is important to use a filler metal that will melt above 800° F, but will be below the melting point of the metals to be joined.

John Bowie works in the HVAC industry where he frequently works with metal joining processes. He is quite familiar with brazing copper as a part of his occupation. On the side, John Bowie enjoys writing about HVAC and technical-related topics to inform others.

Monday, December 16, 2013

Merseyside Maritime Museum School Day Trip

Merseyside’s maritime heritage can be explored with a day trip from Selwyn’s Tours. Students can see replicas from the tales of the Titanic, shanties, smuggling, and sea dogs at the museum. They can get a feel of the central role that was played by Liverpool in the Civil War in America or The Atlantic Battle. A tour of the Liverpool pilot cutter that is moored at the dock is another ship to visit. A trip to the adjacent Pier Master’s House where they can see how the pier master controlled traffic that is routed through the dock can edify their young minds. Selwyn’s Tours can transport your students on this educational trip.
If you are of the opinion that the high seas tales were from yesteryear, you will be totally amazed at the discovery that tax evasion, smuggling, war, and protests, as well as some of the ways and objects that were used in the smuggling of contraband items in those days are still being done today. This can be seen at “Seized! The Border and Customs Uncovered”.
This is a gallery at the museum that details the Custom Officer’s world. It tells of danger and intrigue and presents a key theme on anti-smuggling. It shows detectives at work, fighting crime, patrolling the frontiers and investigating crimes. The tactics that were employed in those days are quite similar to those used today by criminals of the sea and land.
They balance the view of the past with a contemporary story and look at issues of safety and fairness in the society that affects all today. The young visitors can download Matt’s Gallery Trail, or get to test their handling skills at cargo landing with the museum’s Cargo-a-go-go game, which is fairly new.

Educational, fun, and enlightening, a Merseyside Maritime Museum School Day Trip can be one of the most popular attractions in Liverpool. The entry for the museum and the Old Dock tour, which can be organized by the museum workers, is free. The booking should be done in advance. Opening hours are between 10 am and 5 pm on a daily basis. The quayside and ships are closed during winter season. They provide free lessons and the curriculum is linked by displays and collections.


Some sessions are done by members of the museum staff, while others are done by the individuals or group. Topics such as pirates, World War II, or the Titanic are included. Home office issues are discussed in approved sessions targeting drugs, weapons, and alcohol awareness.
Whatever type of trip you decide to plan for, Selwyns’ personalized, expert service can ensure you a safe and smooth trip.

Selwyn’s removes the worry from the planning process of your trip. Plan a trip for January 2014, contact them, and rest assured that everything will be taken care of. They provide coach and bus hire service for over forty years at an economical price. They have coach hire services based in Manchester, Liverpool, and Runcorn. They can get you to the destination comfortably and safely. Even though their location is in the North West, they can take you all over the UK.

Tuesday, September 3, 2013

Controversy Surrounding Metal Detectors in Schools

Security metal detectors in schools are a topic of interest for many parents, educators and lawmakers.  Yet, this simple concept has a variety of complex problems making it easier said than done.  Some may not understand the concept completely or seem to have an understanding from one perspective.  The following points give more insight on why metal detectors in schools is a tough challenge to tackle.
  • Many educators and lawmakers argue it may take too long when screening each student as they enter through a walk-through detector.  Many schools have a large student body and it could cause concern if educational programs are disrupted due to loss of time.
  • How many security professionals will be needed to monitor, train, and operate metal detectors?  Will the detectors be used during the day and what about after school and events?
  • How often would metal detectors be in use by the school? Meaning, when students are scheduled to be in class, will they only be used at this time? Will any of these people work undercover or do surprise inspections to find concealed weapons? If the metal detectors will not be in use 24/7, people could still bring a weapon on the premises and hid it somewhere within the building.
  • How will students enter the building to be screened? Will detectors be at a designated entrance and will students be required to enter this way only? What about screening students before they enter the building but on school property?  Few accounts of school violence have happened outside of the building.
  • What about students who take the bus to school? Will school buses have metal detectors? This poses an issue with windows at ground-level.  What if a student tries to pass a weapon through an unlocked window?
  • Covering the cost of metal detectors.  This aspect alone has a number of concerns such as the type of detectors to use, how many to purchase, the cost of hiring security personnel to train, maintain, and monitor usage, and would the cost considered a return investment if the measure is implemented to its full ability? What about replacing them in the future? How will the cost of using them be covered: who will pay for it?
  • Will visitors and parents be screened?  What about when other non-school related events occur such as Election Day voting or community meetings, will metal detectors be used on these days? 

Here is the fact of the matter, security metal detectors can be a great help to stop harm coming to our children. But if you asked me if they are the solution to all our problems I would say "no". I think most securiy professionals would have the same opinion. To be frank security metal detectors can help a great deal, and price shouldn't be a huge concern when it comes to protecting our children. I believe our schools will never truely be safe as long as humans are in this state of existance. But with the combined efforts of metal detectors, guns for teachers and security cameras we can make our schools a safer place.
Protective Technologies International manufactures and sells walk through metal detectors to help schools become safer